Dental Caries in ChildrenNCT05220865
Hall Technique or Modified Hall Technique of Deep Carious Lesions in Primary Molars
A study testing Hall Technique and Modified Hall Technique in people with Dental Caries in Children and Tooth Diseases, run by Ankara Yildirim Beyazıt University at 1 site in Turkey (Türkiye).
Trial summary
The purpose of this randomized clinical trial is to compare the clinical/radiographic success of Hall technique and modified Hall technique in the treatment of primary molars with deep dentine carious lesions in children (3-12-year-old). Read more about this study
- Who is it for?
- Ages 3 to 12 yearsHealthy volunteers can take part
- Conditions the study is for
- Dental Caries in Children, Tooth Diseases, Tooth Demineralization
- What is being tested?
- Hall Technique and Modified Hall Technique
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 268 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Feb 2022to 1 Sep 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 3 to 12 years
- All sexes
- Healthy volunteers accepted
- Child
Who may be able to join
- Medically healthy children
- Participants attending follow-up appointments
- Children having at least one primary molar tooth with deep dentin caries involving occluso proximal surfaces.
- Tooth inclusion criteria:
- Vital pulp with symptom-free or reversible pulpitis
- Presence of marginal ridge breakdown and accessible cavity with hand instruments,
Show all 17Show fewer
- Presence of active cavitated carious lesion (Code 3 with Nyvad criteria for caries lesion activity and severity assessment- Nyvad et al., 1999)
- Absence of spontaneous or prolonged pain related with irreversible pulpitis
- Absence of fistula or abscess near the tooth
- Absence of pathological mobility
- Absence of pain on percussion
- Absence of pulp exposure
- Caries lesion located in ½ inner part of dentin radiographically
- Presence of sound dentin layer between the deepest part of the carious lesion and the pulp radiographically
- Absence of periapical or furcation pathologies on radiographs
- Absence of internal and external root resorption on radiographs
- More than ½ of root remaining
Who cannot join
- Any systemic disease, physical or mental disorder
- Children or parents who doesn't accept to participate and sign the informed consent
- Clinical or radiographic signs of pulpal or peri-radicular pathology
- Caries cavity which cannot be accessible to hand instruments
- Physiological root resorption more than 1/2 of the root in primary molars
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Ankara Yıldırım Beyazıt University Faculty of Dentistry
Ankara
About this study
Official title: Hall Technique or Modified Hall Technique of Deep Carious Lesions in Primary Molars: A Randomized Clinical Trial
The purpose of this randomized clinical trial is to compare the clinical/radiographic success of Hall technique and modified Hall technique in the treatment of primary molars with deep dentine carious lesions in children (3-12-year-old). The secondary aim is to examine the effect of marginal ridge breakdown level on treatment success.
Read the detailed description
Untreated caries in deciduous teeth affect 532 million children worldwide. According to the Turkey Oral and Dental Health Profile study conducted in 2018, the prevalence of untreated caries in 5-year-old children is 64.4%. The traditional treatment of dentine caries is to restore the teeth after removal of the carious tissue. There is increasing evidence for minimally invasive interventions as an alternative to this traditional operative/restorative treatment.
One of the minimally invasive treatment approaches applied in children is the Hall Technique. Local anesthesia and tooth preparation are not required in this technique, and decayed primary molars are covered with stainless steel crowns without removing any carious tissue. The Hall technique has advantages such as preventing aerosol formation, shortening the treatment time, increasing patient cooperation, and reducing the need for general anesthesia and sedation in noncompliant patients. Its popularity has also increased during the Covid-19 process.
The success of the Hall technique in primary teeth with deep caries has been investigated in a limited number of clinical studies, and it has been observed that the technique has lower success rates in teeth with deep caries than in teeth with shallow/medium depth caries. To answer the question of whether modifying the Hall technique (removing the necrotic carious dentin layer manually with excavators before placing a stainless-steel crown) in deeply carious primary molars will increase the success of the original Hall technique (placing stainless steel crown without any intervention to the carious lesion), a randomized study was designed.
268 healthy children between the ages of 3-12 will be recruited from Ankara Yıldırım Beyazıt University Faculty of Dentistry, Department of Pediatric Dentistry outpatient clinic. Participants who met the inclusion criteria and agreed to participate will be randomly allocated to Group 1 (Modified Hall Technique) or Group 2 (Hall Technique).
The allocation of patients in each group will be carried out by a random list. The sequence will be generated by a computerized random number generator. Enclosed assignments in sequentially numbered, opaque, sealed envelopes will be used as allocation concealment mechanism. Group allocation will be performed by an independent researcher, not involved in the study.
Clinical and radiographic success of treatments will be determined at follow-up appointments at 3rd, 6th and 12th months by one blinded examiner. In follow-up appointments; treatments will be recorded as "successful" (restoration appears satisfactory, no intervention required/ no clinical signs or symptoms of pulpal pathology/ no pathology visible on radiographs/ tooth exfoliated), "minor failure" (crown perforation/ new caries (around margins)/ restoration loss; tooth restorable/ reversible pulpitis treated without requiring pulpotomy or extraction) or "major failure" (irreversible pulpitis or dental abscess requiring pulpotomy or extraction/ inter-radicular radiolucency/ restoration loss; tooth unrestorable/ internal root resorption).
- Conditions
- Dental Caries in Children, Tooth Diseases, Tooth Demineralization, Stomatognathic Diseases
- Being tested
- Hall Technique, Modified Hall Technique
- Keywords
- Hall Technique, Deep dentine caries, Carious primary molars
- Medical subject headings
- Tooth Diseases, Tooth Demineralization, Stomatognathic Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Hall TechniqueProcedure or surgery
- Only food scraps or debris will be removed from the caries cavity.
- The smallest crown size will be selected that covers all cusps and approaches the contact points with a slight "springback" feel.
- If the contact points are tight, orthodontic elastic separators will be placed through the contacts and the SSC will be placed at the second appointment 3-5 days later.
- The SSC will be loaded with glass ionomer luting cement and placed evenly on the tooth.
- The child will be asked to bite firmly until the crown is pushed down over the tooth.
- If the child is unable or unwilling to bite down on the SSC, finger pressure will be used to seat the crown
- The child will continue to bite on a cotton roll until the cement hardens
- Excess glass ionomer cement will be removed from the crown margins with hand instruments and dental floss.
Modified Hall TechniqueProcedure or surgery
- Food scraps or debris will be cleaned from the caries cavity and infected soft carious dentin tissue will be excavated with hand instruments.
- The smallest crown size will be selected that covers all cusps and approaches the contact points with a slight "springback" feel.
- If the contact points are tight, orthodontic elastic separators will be placed through the contacts and the SSC will be placed at the second appointment 3-5 days later.
- The SSC will be loaded with glass ionomer luting cement and placed evenly on the tooth.
- The child will be asked to bite firmly until the crown is pushed down over the tooth.
- If the child is unable or unwilling to bite down on the SSC, finger pressure will be used to seat the crown
- The child will continue to bite on a cotton roll until the cement hardens
- Excess glass ionomer cement will be removed from the crown margins with hand instruments and dental floss.
| Study group | Role | What they receive |
|---|---|---|
| Hall Technique | Active comparator | A preformed metal crown will be cemented on the carious primary molar tooth without any tooth preparation and local anesthesia. Receives: Procedure: Hall Technique |
| Modified Hall Technique | Experimental | In the Modified Hall technique only infected soft dentin tissue will be removed with hand instruments and a preformed metal crown will be placed with Hall technique. Receives: Procedure: Modified Hall Technique |
What is being measured
The primary outcome is the main question the study is designed to answer.
Clinical and radiographic success of the treatments
The clinical evaluation will be performed by one blinded examiner with the criteria as proposed by Innes et al. (2007).
Outcome criteria for the clinical and radiographic assessment of restorations and teeth will be as follows:
Treatments will be considered as "successful" if the restoration appears satisfactory (no intervention required), no clinical signs or symptoms of pulpal pathology, no pathology visible on radiographs or tooth exfoliated
The treatments will be classified as "minor failure" if there is a crown perforation, new caries around margins, restoration loss (tooth restorable) and/or reversible pulpitis treated without requiring pulpotomy or extraction.
The treatments will be classified as "major failure" if there is irreversible pulpitis or dental abscess requiring pulpotomy or extraction, inter-radicular radiolucency, restoration loss (tooth unrestorable) and/or internal root resorption (Innes et al., 2007).
Measured: Change from baseline up to 3, 6 and 12 months
Secondary outcomes (1)
The effect of the amount of marginal ridge fracture on treatment success
The extent of marginal ridge breakdown will be determined by the ratio of the amount of fractured marginal ridge to the total marginal ridge of the tooth and will be scored in 4 groups (<25%, 25-50%, 50-75%, >75%) (Cho et al.,2018).
Measured: Change from baseline up to 3, 6 and 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Feb 2022
- Study start1 Feb 2022
- Primary completion1 Sep 2023
- Study completion1 Sep 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (8)Papers the sponsor has linked to this study.
- Other trials for Dental Caries in ChildrenStudies of the same condition, open and under way.
- More trials run by Ankara Yildirim Beyazıt UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 268 participants (actual)
Sponsor and investigators
- Lead sponsor
- Ankara Yildirim Beyazıt University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, AYŞE IŞIL CİHAN, Ankara Yildirim Beyazıt University
- Investigators
- Ayşe I. Orhan, Assoc. Prof., Study chair, Ankara Yıldırım Beyazit University Faculty of Dentistry
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05220865
- Sponsor's protocol ID
- E2-21-956
- Status last verified
- Oct 2025
- First submitted
- 22 Jan 2022
- Last updated
- 6 Oct 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Boyd DH, Thomson WM, Leon de la Barra S, Fuge KN, van den Heever R, Butler BM, Leov F, Foster Page LA. A Primary Care Randomized Controlled Trial of Hall and Conventional Restorative Techniques. JDR Clin Trans Res. 2021 Apr;6(2):205-212. doi: 10.1177/2380084420933154. Epub 2020 Jun 19.
PubMed 32559403Boyd DH, Page LF, Thomson WM. The Hall Technique and conventional restorative treatment in New Zealand children's primary oral health care - clinical outcomes at two years. Int J Paediatr Dent. 2018 Mar;28(2):180-188. doi: 10.1111/ipd.12324. Epub 2017 Aug 8.
PubMed 28787534Eden E, Frencken J, Gao S, Horst JA, Innes N. Managing dental caries against the backdrop of COVID-19: approaches to reduce aerosol generation. Br Dent J. 2020 Oct;229(7):411-416. doi: 10.1038/s41415-020-2153-y. Epub 2020 Oct 9.
PubMed 33037360GBD 2017 Oral Disorders Collaborators; Bernabe E, Marcenes W, Hernandez CR, Bailey J, Abreu LG, Alipour V, Amini S, Arabloo J, Arefi Z, Arora A, Ayanore MA, Barnighausen TW, Bijani A, Cho DY, Chu DT, Crowe CS, Demoz GT, Demsie DG, Dibaji Forooshani ZS, Du M, El Tantawi M, Fischer F, Folayan MO, Futran ND, Geramo YCD, Haj-Mirzaian A, Hariyani N, Hasanzadeh A, Hassanipour S, Hay SI, Hole MK, Hostiuc S, Ilic MD, James SL, Kalhor R, Kemmer L, Keramati M, Khader YS, Kisa S, Kisa A, Koyanagi A, Lalloo R, Le Nguyen Q, London SD, Manohar ND, Massenburg BB, Mathur MR, Meles HG, Mestrovic T, Mohammadian-Hafshejani A, Mohammadpourhodki R, Mokdad AH, Morrison SD, Nazari J, Nguyen TH, Nguyen CT, Nixon MR, Olagunju TO, Pakshir K, Pathak M, Rabiee N, Rafiei A, Ramezanzadeh K, Rios-Blancas MJ, Roro EM, Sabour S, Samy AM, Sawhney M, Schwendicke F, Shaahmadi F, Shaikh MA, Stein C, Tovani-Palone MR, Tran BX, Unnikrishnan B, Vu GT, Vukovic A, Warouw TSS, Zaidi Z, Zhang ZJ, Kassebaum NJ. Global, Regional, and National Levels and Trends in Burden of Oral Conditions from 1990 to 2017: A Systematic Analysis for the Global Burden of Disease 2017 Study. J Dent Res. 2020 Apr;99(4):362-373. doi: 10.1177/0022034520908533. Epub 2020 Mar 2.
PubMed 32122215Innes NP, Stirrups DR, Evans DJ, Hall N, Leggate M. A novel technique using preformed metal crowns for managing carious primary molars in general practice - a retrospective analysis. Br Dent J. 2006 Apr 22;200(8):451-4; discussion 444. doi: 10.1038/sj.bdj.4813466.
PubMed 16703041Innes NP, Evans DJ, Stirrups DR. The Hall Technique; a randomized controlled clinical trial of a novel method of managing carious primary molars in general dental practice: acceptability of the technique and outcomes at 23 months. BMC Oral Health. 2007 Dec 20;7:18. doi: 10.1186/1472-6831-7-18.
PubMed 18096042Nyvad B, Baelum V. Nyvad Criteria for Caries Lesion Activity and Severity Assessment: A Validated Approach for Clinical Management and Research. Caries Res. 2018;52(5):397-405. doi: 10.1159/000480522. Epub 2018 Mar 5.
PubMed 29506010Konukman Turker S, Cihan AI. Two-year outcomes of hall technique and modified hall technique in deep carious lesions of primary molars: a randomized clinical trial. BMC Oral Health. 2026 Jan 12;26(1):306. doi: 10.1186/s12903-026-07667-2.
PubMed 41526924
Study at a glance
From the registry record, last updated by the sponsor on 6 Oct 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Hall Technique or Modified Hall Technique of Deep Carious Lesions in Primary Molars: A Randomized Clinical Trial
- ClinicalTrials.gov ID
- NCT05220865
- Acronym / sponsor ID
- E2-21-956
- Conditions
- Dental Caries in Children, Tooth Diseases, Tooth Demineralization, Stomatognathic Diseases
- Keywords
- Hall Technique, Deep dentine caries, Carious primary molars
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 268 participants (actual)
- Lead sponsor
- Ankara Yildirim Beyazıt UniversityUniversity, hospital or other
- Study start
- 1 Feb 2022 (actual)
- Primary completion
- 1 Sep 2023 (actual)
- Study completion
- 1 Sep 2025 (actual)
- First posted
- 2 Feb 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this randomized clinical trial is to compare the clinical/radiographic success of Hall technique and modified Hall technique in the treatment of primary molars with deep dentine carious lesions in children (3-12-year-old). The secondary aim is to examine the effect of marginal ridge breakdown level on treatment success.
Detailed description
Untreated caries in deciduous teeth affect 532 million children worldwide. According to the Turkey Oral and Dental Health Profile study conducted in 2018, the prevalence of untreated caries in 5-year-old children is 64.4%. The traditional treatment of dentine caries is to restore the teeth after removal of the carious tissue. There is increasing evidence for minimally invasive interventions as an alternative to this traditional operative/restorative treatment.
One of the minimally invasive treatment approaches applied in children is the Hall Technique. Local anesthesia and tooth preparation are not required in this technique, and decayed primary molars are covered with stainless steel crowns without removing any carious tissue. The Hall technique has advantages such as preventing aerosol formation, shortening the treatment time, increasing patient cooperation, and reducing the need for general anesthesia and sedation in noncompliant patients. Its popularity has also increased during the Covid-19 process.
The success of the Hall technique in primary teeth with deep caries has been investigated in a limited number of clinical studies, and it has been observed that the technique has lower success rates in teeth with deep caries than in teeth with shallow/medium depth caries. To answer the question of whether modifying the Hall technique (removing the necrotic carious dentin layer manually with excavators before placing a stainless-steel crown) in deeply carious primary molars will increase the success of the original Hall technique (placing stainless steel crown without any intervention to the carious lesion), a randomized study was designed.
268 healthy children between the ages of 3-12 will be recruited from Ankara Yıldırım Beyazıt University Faculty of Dentistry, Department of Pediatric Dentistry outpatient clinic. Participants who met the inclusion criteria and agreed to participate will be randomly allocated to Group 1 (Modified Hall Technique) or Group 2 (Hall Technique).
The allocation of patients in each group will be carried out by a random list. The sequence will be generated by a computerized random number generator. Enclosed assignments in sequentially numbered, opaque, sealed envelopes will be used as allocation concealment mechanism. Group allocation will be performed by an independent researcher, not involved in the study.
Clinical and radiographic success of treatments will be determined at follow-up appointments at 3rd, 6th and 12th months by one blinded examiner. In follow-up appointments; treatments will be recorded as "successful" (restoration appears satisfactory, no intervention required/ no clinical signs or symptoms of pulpal pathology/ no pathology visible on radiographs/ tooth exfoliated), "minor failure" (crown perforation/ new caries (around margins)/ restoration loss; tooth restorable/ reversible pulpitis treated without requiring pulpotomy or extraction) or "major failure" (irreversible pulpitis or dental abscess requiring pulpotomy or extraction/ inter-radicular radiolucency/ restoration loss; tooth unrestorable/ internal root resorption).
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind (participant, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Hall Technique | Active comparator | Procedure: Hall TechniqueA preformed metal crown will be cemented on the carious primary molar tooth without any tooth preparation and local anesthesia. |
| Modified Hall Technique | Experimental | Procedure: Modified Hall TechniqueIn the Modified Hall technique only infected soft dentin tissue will be removed with hand instruments and a preformed metal crown will be placed with Hall technique. |
Who may qualify
- Ages
- 3 to 12 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (17 listed)
- Medically healthy children
- Participants attending follow-up appointments
- Children having at least one primary molar tooth with deep dentin caries involving occluso proximal surfaces.
- Vital pulp with symptom-free or reversible pulpitis
- Presence of marginal ridge breakdown and accessible cavity with hand instruments,
Key exclusion criteria (5 listed)
- Any systemic disease, physical or mental disorder
- Children or parents who doesn't accept to participate and sign the informed consent
- Clinical or radiographic signs of pulpal or peri-radicular pathology
- Caries cavity which cannot be accessible to hand instruments
- Physiological root resorption more than 1/2 of the root in primary molars
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Hall Technique* Only food scraps or debris will be removed from the caries cavity. * The smallest crown size will be selected that covers all cusps and approaches the contact points with a slight "springback" feel. * If the contact points are tight, orthodontic elastic separators will be placed through the contacts and the SSC will be placed at the second appointment 3-5 days later. * The SSC will be loaded with glass ionomer luting cement and placed evenly on the tooth. * The child will be asked to bite firmly until the crown is pushed down over the tooth. * If the child is unable or unwilling to bite down on the SSC, finger pressure will be used to seat the crown * The child will continue to bite on a cotton roll until the cement hardens * Excess glass ionomer cement will be removed from the crown margins with hand instruments and dental floss. | Procedure or surgery | Hall Technique |
| Modified Hall Technique* Food scraps or debris will be cleaned from the caries cavity and infected soft carious dentin tissue will be excavated with hand instruments. * The smallest crown size will be selected that covers all cusps and approaches the contact points with a slight "springback" feel. * If the contact points are tight, orthodontic elastic separators will be placed through the contacts and the SSC will be placed at the second appointment 3-5 days later. * The SSC will be loaded with glass ionomer luting cement and placed evenly on the tooth. * The child will be asked to bite firmly until the crown is pushed down over the tooth. * If the child is unable or unwilling to bite down on the SSC, finger pressure will be used to seat the crown * The child will continue to bite on a cotton roll until the cement hardens * Excess glass ionomer cement will be removed from the crown margins with hand instruments and dental floss. | Procedure or surgery | Modified Hall Technique |
Primary outcome
Clinical and radiographic success of the treatments
Time frame: Change from baseline up to 3, 6 and 12 months
The clinical evaluation will be performed by one blinded examiner with the criteria as proposed by Innes et al. (2007). Outcome criteria for the clinical and radiographic assessment of restorations and teeth will be as follows: Treatments will be considered as "successful" if the restoration appears satisfactory (no intervention required), no clinical signs or symptoms of pulpal pathology, no pathology visible on radiographs or tooth exfoliated The treatments will be classified as "minor failure" if there is a crown perforation, new caries around margins, restoration loss (tooth restorable) and/or reversible pulpitis treated without requiring pulpotomy or extraction. The treatments will be classified as "major failure" if there is irreversible pulpitis or dental abscess requiring pulpotomy or extraction, inter-radicular radiolucency, restoration loss (tooth unrestorable) and/or internal root resorption (Innes et al., 2007).
1 secondary outcome
The effect of the amount of marginal ridge fracture on treatment success
Time frame: Change from baseline up to 3, 6 and 12 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Oct 2025.
- Background: PubMed 32559403Boyd DH, Thomson WM, Leon de la Barra S, Fuge KN, van den Heever R, Butler BM, Leov F, Foster Page LA. A Primary Care Randomized Controlled Trial of Hall and Conventional Restorative Techniques. JDR Clin Trans Res. 2021 Apr;6(2):205-212. doi: 10.1177/2380084420933154. Epub 2020 Jun 19.
- Background: PubMed 28787534Boyd DH, Page LF, Thomson WM. The Hall Technique and conventional restorative treatment in New Zealand children's primary oral health care - clinical outcomes at two years. Int J Paediatr Dent. 2018 Mar;28(2):180-188. doi: 10.1111/ipd.12324. Epub 2017 Aug 8.
- Background: PubMed 33037360Eden E, Frencken J, Gao S, Horst JA, Innes N. Managing dental caries against the backdrop of COVID-19: approaches to reduce aerosol generation. Br Dent J. 2020 Oct;229(7):411-416. doi: 10.1038/s41415-020-2153-y. Epub 2020 Oct 9.
- Background: PubMed 32122215GBD 2017 Oral Disorders Collaborators; Bernabe E, Marcenes W, Hernandez CR, Bailey J, Abreu LG, Alipour V, Amini S, Arabloo J, Arefi Z, Arora A, Ayanore MA, Barnighausen TW, Bijani A, Cho DY, Chu DT, Crowe CS, Demoz GT, Demsie DG, Dibaji Forooshani ZS, Du M, El Tantawi M, Fischer F, Folayan MO, Futran ND, Geramo YCD, Haj-Mirzaian A, Hariyani N, Hasanzadeh A, Hassanipour S, Hay SI, Hole MK, Hostiuc S, Ilic MD, James SL, Kalhor R, Kemmer L, Keramati M, Khader YS, Kisa S, Kisa A, Koyanagi A, Lalloo R, Le Nguyen Q, London SD, Manohar ND, Massenburg BB, Mathur MR, Meles HG, Mestrovic T, Mohammadian-Hafshejani A, Mohammadpourhodki R, Mokdad AH, Morrison SD, Nazari J, Nguyen TH, Nguyen CT, Nixon MR, Olagunju TO, Pakshir K, Pathak M, Rabiee N, Rafiei A, Ramezanzadeh K, Rios-Blancas MJ, Roro EM, Sabour S, Samy AM, Sawhney M, Schwendicke F, Shaahmadi F, Shaikh MA, Stein C, Tovani-Palone MR, Tran BX, Unnikrishnan B, Vu GT, Vukovic A, Warouw TSS, Zaidi Z, Zhang ZJ, Kassebaum NJ. Global, Regional, and National Levels and Trends in Burden of Oral Conditions from 1990 to 2017: A Systematic Analysis for the Global Burden of Disease 2017 Study. J Dent Res. 2020 Apr;99(4):362-373. doi: 10.1177/0022034520908533. Epub 2020 Mar 2.
- Background: PubMed 16703041Innes NP, Stirrups DR, Evans DJ, Hall N, Leggate M. A novel technique using preformed metal crowns for managing carious primary molars in general practice - a retrospective analysis. Br Dent J. 2006 Apr 22;200(8):451-4; discussion 444. doi: 10.1038/sj.bdj.4813466.
- Background: PubMed 18096042Innes NP, Evans DJ, Stirrups DR. The Hall Technique; a randomized controlled clinical trial of a novel method of managing carious primary molars in general dental practice: acceptability of the technique and outcomes at 23 months. BMC Oral Health. 2007 Dec 20;7:18. doi: 10.1186/1472-6831-7-18.
- Background: PubMed 29506010Nyvad B, Baelum V. Nyvad Criteria for Caries Lesion Activity and Severity Assessment: A Validated Approach for Clinical Management and Research. Caries Res. 2018;52(5):397-405. doi: 10.1159/000480522. Epub 2018 Mar 5.
- Derived from this study: PubMed 41526924Konukman Turker S, Cihan AI. Two-year outcomes of hall technique and modified hall technique in deep carious lesions of primary molars: a randomized clinical trial. BMC Oral Health. 2026 Jan 12;26(1):306. doi: 10.1186/s12903-026-07667-2.
- Cho V, Anthonappa R, King N." Marginal Ridge Breakdown as a Predictor for Pulpal Involvement in Primary Molar". The International Association of Pediatric Dentistry. Global Summit on Early Childhood Caries.Link provided by the sponsor.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ayşe I. Orhan, Assoc. Prof. study chair
Ankara Yıldırım Beyazit University Faculty of Dentistry
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Hall Technique and Modified Hall Technique in people with Dental Caries in Children and Tooth Diseases, run by Ankara Yildirim Beyazıt University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 17 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Oct 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Clinical and radiographic success of the treatments (time frame: Change from baseline up to 3, 6 and 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05220865, which also lists 8 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Oct 2025.